Beginner – IntermediateMimicry Otocinclus
Otocinclus mimulus
- Adult size
- up to 4.5 cm
- Aquarium size
- 45 L or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 22–26 °C
Aquarium Fish Database
Explore freshwater aquarium fish by care level, size, temperament, swimming zone, water parameters, and compatibility.
Beginner – Intermediate
Beginner – IntermediateMini Rosy Tetra
Hyphessobrycon dorsalis
- Adult size
- up to 3 cm
- Aquarium size
- 30 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 23–28 °C
Beginner – IntermediateMiniature Pencilfish
Nannostomus anduzei
- Adult size
- up to 2 cm
- Aquarium size
- 30 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–28 °C
IntermediateMirabilis Eartheater
Geophagus mirabilis
- Adult size
- up to 20 cm
- Aquarium size
- 240 L or larger
- Temperament
- Peaceful
- Zone
- Middle swimmer
- Temp
- 22–30 °C
Beginner – IntermediateMolly
Poecilia latipinna
- Adult size
- up to 12 cm
- Aquarium size
- 100 L or larger
- Temperament
- Peaceful
- Temp
- 22–26 °C
Beginner – IntermediateMonica’s Tetra
Moenkhausia monicae
- Adult size
- up to 5 cm
- Aquarium size
- 45 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–26 °C
Beginner – IntermediateMonkey Goby
Neogobius fluviatilis
- Adult size
- up to 20 cm
- Aquarium size
- 240 L or larger
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 4–20 °C
Beginner – IntermediateMontags Tetra
Hyphessbrycon montagi
- Adult size
- up to 3 cm
- Aquarium size
- 30 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–27 °C
Beginner – IntermediateMoonlight Gourami
Trichopodus microlepis
- Adult size
- up to 15 cm
- Aquarium size
- 160 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–30 °C
IntermediateMorse Knifefish
Gymnorhamphichthys hypostomus
- Adult size
- up to 21.5 cm
- Aquarium size
- 300 L or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 25–28 °C
Intermediate – AdvancedMotoro Stingray
Potamotrygon motoro
- Adult size
- up to 90 cm
- Aquarium size
- 900 L or larger
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 24–26 °C
Beginner – IntermediateMottled Ctenopoma
Ctenopoma weeksii
- Adult size
- up to 12 cm
- Aquarium size
- 120 L or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 23–27 °C
Beginner – IntermediateMountain Redbelly Dace
Chrosomus oreas
- Adult size
- up to 7 cm
- Aquarium size
- 80 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 15–25 °C
IntermediateMousetail Knifefish
Gymnorhamphichthys rondoni
- Adult size
- up to 15 cm
- Aquarium size
- 160 L or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 25–28 °C
BeginnerMoustached Danio
Danio dangila
- Adult size
- up to 12 cm
- Aquarium size
- 120 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 16–24 °C
Beginner – IntermediateMurray River Rainbowfish
Melanotaenia fluviatilis
- Adult size
- up to 10 cm
- Aquarium size
- 120 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 20–25 °C
Beginner – IntermediateMyer’s Hillstream Loach
Pseudogastromzon myersi
- Adult size
- up to 6 cm
- Aquarium size
- 80 L or larger
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 20–24 °C
Beginner – IntermediateNapo Corydoras
Corydoras napoensis
- Adult size
- up to 5 cm
- Aquarium size
- 60 L or larger
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 22–26 °C
Beginner – IntermediateNarayan Barb
Pethia setnai
- Adult size
- up to 7 cm
- Aquarium size
- 80 L or larger
- Temperament
- Peaceful
- Zone
- Middle swimmer
- Temp
- 20–26 °C
Beginner – IntermediateNego Dagua Tetra
Hyphessobrycon negodagua
- Adult size
- up to 3 cm
- Aquarium size
- 30 L or larger
- Temperament
- Peaceful
- Zone
- Bottom to middle swimmer
- Temp
- 23–27 °C
IntermediateNeon Blue Rasbora
Sundadanio axelrodi
- Adult size
- up to 2 cm
- Aquarium size
- 30 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–26 °C
Beginner – IntermediateNeon Borneo Sucker
Gastromyzon lepidogaster
- Adult size
- up to 10 cm
- Aquarium size
- 120 L or larger
- Temperament
- Peaceful
- Zone
- Bottom dweller
- Temp
- 18–24 °C
Beginner – IntermediateNeon Green Rasbora
Microdevario kubotai
- Adult size
- up to 2 cm
- Aquarium size
- 30 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–27 °C
Beginner – IntermediateNeon Red Rasbora
Sundadanio rubellus
- Adult size
- up to 2 cm
- Aquarium size
- 30 L or larger
- Temperament
- Peaceful
- Zone
- Middle to top swimmer
- Temp
- 22–26 °C
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